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MAX3466 Datasheet

Profibus RS-485/RS-422 Transceivers

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19-3038; Rev 3; 5/12
+5V, Fail-Safe, 40Mbps, Profibus RS-485/
RS-422 Transceivers
General Description
The MAX3465–MAX3469 are high-speed differential
bus transceivers for RS-485 and RS-422 communica-
tions. They are designed to meet TIA/EIA-422-B,
TIA/EIA-485-A, V.11, and X.27 standards. The trans-
ceiver complies with the Profibus specification provid-
ing +2.1V minimum output level with a 54Ω load,
40Mbps data rate, and output skew less than 2ns. Each
part contains one three-state differential line driver and
one differential input line receiver. The devices operate
from a +5V supply and feature true fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This enables all
receiver outputs on a terminated bus to output logic
highs when all transmitters are disabled.
All devices feature a 1/4-standard-unit load receiver
input impedance that allows 128 transceivers on the
bus. Driver and receiver propagation delays are guar-
anteed under 20ns for multidrop, clock distribution
applications. Drivers are short-circuit current limited
and are protected against excessive power dissipation
by thermal-shutdown circuitry. The driver and receiver
feature active-high and active-low enables, respective-
ly, that can be connected together externally to serve
as a direction control.
Applications
High-Speed RS-485 Communications
High-Speed RS-422 Communications
Level Translators
Industrial-Control Local Area Networks
Profibus Applications
Features
Recommended for Profibus Applications
Up to 40Mbps Data Rate
15ns Transmitter Propagation Delay
20ns Receiver Propagation Delay
2ns Transmitter and Receiver Skew
High Differential Driver Output Level (2.1V on 54Ω)
Hot-Swap Versions
1µA Shutdown Supply Current
Low Supply Current Requirements (2.5mA, typ)
Allow Up to 128 Transceivers on the Bus
True Fail-Safe Receiver while Maintaining EIA/TIA-
485 Compatibility
Designed for Multipoint Transmissions on Long
or Noisy Bus Lines
Full-Duplex and Half-Duplex Versions Available
Phase Controls to Correct for Twisted-Pair
Reversal for 14-Pin Versions
Current-Limiting and Thermal Shutdown for
Driver Overload Protection
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3465CSD
0°C to +70°C 14 SO
MAX3465CPD
0°C to +70°C 14 Plastic DIP
MAX3465ESD
-40°C to +85°C 14 SO
MAX3465EPD
-40°C to +85°C 14 Plastic DIP
Ordering Information continued at end of data sheet.
Devices are also available in a lead(Pb)-free/RoHS-compliant
package. Specify lead-free by adding “+” to the part number
when ordering.
Pin Configurations appear at end of data sheet.
Selector Guide
PART
NUMBER
MAX3465
MAX3466
MAX3467
MAX3468
MAX3469
HALF/FULL
DUPLEX
Full
Full
Full
Half
Half
RECEIVER/
DRIVER
ENABLE
Yes
Yes
No
Yes
Yes
LOW-
POWER
SHUTDOWN
Yes
Yes
No
Yes
Yes
HOT SWAP
Yes
No
No
Yes
No
RECEIVER/
DRIVER PHASE
SELECT
Yes
Yes
No
No
No
INDEPENDENT
SHDN PIN
Yes
Yes
No
No
No
PIN COUNT
14
14
8
8
8
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3466 Datasheet

Profibus RS-485/RS-422 Transceivers

No Preview Available !

+5V, Fail-Safe, 40Mbps, Profibus RS-485/
RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) to GND ..................................-0.3V to +6V
Control Input Voltage (RE, DE, DI, SHDN, TXP, RXP)
to GND....................................................-0.3V to (VCC + 0.3V)
Driver Output Voltage (Y, Z) to GND .........................-8V to +13V
Receiver Input Voltage (A, B) to GND.......................-8V to +13V
Differential Driver Output Voltage (Y - Z) ...............................±8V
Differential Receiver Input (A - B) ..........................................±8V
Receiver Output Voltage (RO) to GND.......-0.3V to (VCC + 0.3V)
Output Driver Current (Y, Z) ...........................................±250mA
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C) .........................471mW
DIP (derate 9.09mW/°C above +70°C) ........................727mW
SO (derate 8.33mW/°C above +70°C) .........................667mW
DIP (derate 10mW/°C above +70°C) ...........................800mW
Operating Temperature Range
MAX346_C__ ......................................................0°C to +70°C
MAX346_E__....................................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-Free..............................................................+260°C
Containing Lead(Pb)....................................................+240°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
Power-Supply Range
DRIVER
VCC
4.75 5.25
Differential Driver Output
(No Load)
VOD Figure 5, R =
VCC
Differential Driver Output
VOD Figure 5, R = 27Ω
2.1
Change in Magnitude of
Differential Output Voltage
ΔVOD Figure 5, R = 50Ω or 27Ω (Note 2)
0.2
UNITS
V
V
V
V
Driver Common-Mode Output
Voltage
VOC Figure 5, R = 50Ω or 27Ω
3V
Change in Magnitude of
Common-Mode Voltage
Input High Voltage
Input Low Voltage
Input Hysteresis
Output Leakage (Y and Z) Full
Duplex
Input Current
Pulldown Current
Driver Short-Circuit Output
Current (Note 3)
Driver Short-Circuit Foldback
Output Current (Note 3)
Thermal Shutdown Threshold
RECEIVER
Differential Input Capacitance
Input Current (A and B) Full
Duplex
ΔVOC
VIH
VIL
VHYS
IO
IIN
IOSD
IOSFD
Figure 5, R = 50Ω or 27Ω (Note 2)
DE, DI, RE, SHDN
DE, DI, RE, SHDN
DE, DI, RE, SHDN
DE = GND, VCC =
GND or +5.25V
DI, RE, DE, SHDN
VIN = +12V
VIN = -7V
RXP = TXP = VCC
0 VOUT +12V, output low
-7V VOUT VCC, output high
(VCC - 1V) VOUT +12V, output low
-7V VOUT +1V, output high
CA, B
IA, B
Between A and B
DE = GND,
VCC = GND or +5.25V
VIN = +12V
VIN = -7V
0.2 V
2.0 V
0.8 V
50 mV
-100
+125
µA
±1 µA
5 15 30 µA
-250
+250
mA
+25
mA
-25
140 °C
8 pF
-200
+250
µA
2


Part Number MAX3466
Description Profibus RS-485/RS-422 Transceivers
Maker Maxim Integrated
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MAX3466 Datasheet PDF





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